High-performance ZSM-5 membranes with a low Si/Al ratio of 10.3 were prepared on cheap coarse macroporous alpha-Al2O3 tubes by fluoride route without organic template. The effects of crystallization time and aluminum source on the growth, morphology and pervaporation (PV) performances of the as-synthesized membranes were investigated. The feasibility of preparing ZSM-5 membranes with different Si/Al ratio which was implemented by using different Al-2(SO4)(3).18H(2)O content in synthesis gel were discussed. It was found that the aluminum source had significant effect on the synthesis of membranes. The ZSM-5 membranes prepared by using Al-2(SO4)(3).18H(2)O as an aluminum source from synthetic gel with composition of 1SiO(2)/0.05Al(2)O(3)/0.17Na(2)O/0.9NaF/45H(2)O showed high reproducibility and high PV performance with flux of 3.85 kg/(m(2).h) and separation factor of higher than 10,000 in dehydration of 90 wt % i-PrOH/H2O at 348 K. Moreover, the ZSM-5 membranes exhibited high water perm-selectivity performance for dehydration of 90 wt % n-PrOH/H2O, n-BtOH/H2O, and i-BtOH/H2O mixtures, respectively. (C) 2016 American Institute of Chemical Engineers